The new 4,600 km internet highway between Beijing and Shanghai incorporates two satellites which receive instantaneous ‘teleported’ quantum data, making at least that part of the network infinitely fast, and defying the laws of physics.
And the latest quantum computer can solve mathematical problems in seconds that the world’s fastest conventional computer, Japan’s Fugaku, would take an estimated 600 million years to solve.
Albert Einstein called instant quantum entanglement “spooky”, and for a good reason.
Dr Ben Buchler, associate professor at the Australian National University, explains the phenomenon using two bowls of quantum-entangled Smarties. In his example, two people pick Smarties from the bowls without looking at their colour. The chance of the Smarties being orange or green or red is essentially random.
Scientists have established the world’s first integrated quantum communication network, combining over 700 optical fibers on the ground with two ground-to-satellite links to achieve quantum key distribution over a total distance of 4,600 kilometers for users across the country. Credit: University of Science and Technology of China
But as soon as one person looks at her/his Smartie, the other Smartie instantly changes to the exact opposite colour. Spooky. The principle is the same for entangled photons: one photon instantly reacts to interaction with its pair, despite any distance separating them, instantly.
The distance doesn’t matter, it could be one meter between the smarties, or the 1,400 km to the Chinese satellite, or a million light years away. It teleports instantaneously, infinitely fast. Einstein hated it because it destroys the Theory of Relativity, that nothing can go faster than light, that our science depends on.
So a future model of the Chinese computer could in theory communicate instantly with a planet in a galaxy a billion light years away, and perhaps objects and people could one day be teleported. (Only that with present technology you would need to first send the reception particles there to receive the information, which would take billions of years).
The phenomenon of quantum entanglement cannot be explained by present science, and forces us to reconsider wild theories of multiple dimensions, parallel universes or ‘Tesla vs. Einstein’, the Theory of the Ether.
But that has not stopped the scientists from using these properties to create unimaginably fast computers and instantaneous unhackable communications.
The quantum leap forward: On birthing the world’s fastest, most advanced internet network
By Brian McGleenon, a journalist who has worked for Fuji Television, The Daily Express, The Independent, KBS and Pear Video.
Beijing’s new quantum computer can solve mathematical problems in 200 seconds that it would take current supercomputers millions of years to solve – and the network around it will revolutionise how we live and work.
The team, led by Jianwei Pan, Yuao Chen, Chengzhi Peng from the University of Science and Technology of China in Hefei, reported in Nature their latest advances towards the global, practical application of such a network for future communications.
The development of its Jiuzhang quantum computer last month surpassed Google’s Sycamore quantum device with its ability to calculate 100 trillion times faster than the fastest classical supercomputer.
Earlier this month, a network of satellite relays and fiber optic cables between Shanghai and Beijing was able to “teleport” huge amounts of data.
The world is now witnessing the birth of the quantum internet that will revolutionize society by allowing unhackable transfers of data and optimizing machine learning for the ‘internet of things’, and possibly leading to instantaneous communication when developed further.
Quantum computing allows the evaluating of multiple possibilities at once and the performing of complex calculations not possible on normal computers.
Wave particle duality: The Quantum Around You. Ep 4
“Quantum computers aren’t just about doing things faster or more efficiently,” a Wired article explained last year. “They’ll let us do things that we couldn’t even have dreamed of without them. Things that even the best supercomputer just isn’t capable of.”
As the writer described it: “If you ask a normal computer to figure its way out of a maze, it will try every single branch in turn, ruling them all out individually until it finds the right one. A quantum computer can go down every path of the maze at once. It can hold uncertainty in its head.”
The scientists teleported quantum information 1,400km (870 miles) to two satellites then back to earth via receiver stations – a first step in creating a global-scale quantum internet.
Together with the development of Jiuzhang, the recent developments have pushed the country to the forefront in the race to win the ‘quantum age’ – a development that will unnerve Washington and Silicon Valley.
Professor Lo Hoi-kwong, of the University of Hong Kong predicted that the technology would have advanced applications for the Chinese military, its finance sector, and for the country’s overall communications.
Next up, the team will further expand the network and with their international partners from Austria, Italy, Russia and Canada. They also aim to develop small-scale, cost-efficient QKD satellites and ground-based receivers, as well as medium and high earth orbit satellites to achieve all-time, ten-thousand-km-level QKD.
One of the key architects of Jiuzhang, Professor Chao-Yang Lu, of the University of Science and Technology, told RT.com that the computer gained “quantum advantage” over the most advanced classic supercomputer through the use of photons of light to solve calculations, instead of the classical use of electrical binary signals in microprocessors.
He claimed the revolutionary design would allow computations that would take conventional supercomputers hundreds of millions of years to solve to be executed in seconds. Speaking to RT.com from his office in Beijing, Professor Lu said the applications of the new technology would transform “the field of quantum chemistry and optimization, which can be helpful in designing new materials and machine learning”.
He explained how Jiuzhang could be deployed in China’s quantum internet development, “because it can be used as a node,” able to program and store information being communicated through the quantum network.
The professor added that the device had an advantage over its competitors, such as Sycamore,as “it uses photons that are naturally compatible with the internet because obviously flying photons are the fastest and only sensible way to transfer information over long distances”.
He added that “quantum computation and quantum communication using photons share a lot of techniques in common”. Sycamore relies on super-cold, superconducting metal, whereas the Chinese alternative can operate at room temperature.
One promising application for quantum computers is their ability to solve machine-learning optimization problems and quickly read huge data sets, for example giving exact Climate Change forecasts. This speeding up of machine-learning algorithms will allow much more advanced autonomous devices. The development of the internet of things will see vast scales of data gathered every second by devices, sensors and machines. Quantum computers would be ideal information-processing systems.
Professor Lu emphasized that the phrase “quantum supremacy” was not about political domination, but based on such devices outperforming classical supercomputers. (insert: indeed the network in China is built with their international partners from Austria, Italy, Russia and Canada ).
He stressed: “Building quantum computer machines is a race between nature and humans, not between countries… The whole international community should closely collaborate. We should encourage more open scientific exchange in both knowledge and people.”
Since 2016, president Xi Jinping has been aggressively pushing the advancement of the nation’s research into quantum technology. The move is a key part of his blueprint to make China technologically self-reliant and a global leader in scientific research and development. He has set the nation a goal of achieving dominance in the area of quantum computing by 2030.
Billions of dollars have been poured into the quest, and a new institute created: the National Laboratory for Quantum Information Sciences. The institute was behind the creation of the integrated quantum network, consisting of two satellites and thousands of kilometers of optical fiber cables linking key government facilities, power grids, military posts, and banks between Beijing and Shanghai. The whole system is claimed to be immune from disruptive cyber-attacks.
According to the Global Times, president Xi announced at a CCP group study session in October 2020 that he wanted to strengthen “top-level design” in the field of quantum science and encouraged the acceleration of “breakthroughs in basic research”.
The US has responded testily to China’s ambitions in quantum computing, particularly fearing its military applications. In 2018, President Donald Trump placed his signature to the National Quantum Initiative Act, which pledged $1.2 billion for research in the field over five years.
In the same year, the US military implicitly referred to China’s quantum advancements as a national security threat in a statement titled ‘Technologies for Threat Military Applications’.
It read: “A global race has ensued to exploit and operationalize quantum technologies for the use of military effects. The race to conquer the quantum domain is among the most fiercely competitive in today’s world of technology.”
The core of quantum communication is quantum key distribution (QKD), which uses the quantum states of particles — e.g. photons — to form a string of zeros and ones, while any eavesdropping between the sender and the receiver will change this string or key and be noticed immediately. So far, the most common QKD technology uses optical fibers for transmissions over several hundred kilometers, with high stability but considerable channel loss. Another major QKD technology uses the free space between satellites and ground stations for thousand-kilometer-level transmissions. In 2016, China launched the world’s first quantum communication satellite (QUESS, or Mozi/Micius) and achieved QKD with two ground stations which are 2,600 km apart. In 2017, an over 2,000-km-long optical fiber network was completed for QKD between Beijing and Shanghai.
Quantum computing can utilize two fundamental properties of quantum mechanics: superposition and entanglement. Superposition means the information held in ‘qubits’ can exist in two different states simultaneously. This could allow vast amounts of information to be stored in sections of code.
The infinite variables allow the quantum computer vast amounts of processing power, because each qubit can perform multiple calculations at once. Superposition also greatly increases the speed by which a quantum computer can solve certain problems that would take classical computers millions of years.
For instance, the computational advantage of China’s quantum computer can solve mathematical problems in seconds that the world’s fastest conventional computer, Japan’s Fugaku, would take an estimated 600 million years to solve.
Entanglement is another advantage of the quantum and is one of the strangest phenomena of quantum mechanics. Einstein called entanglement “spooky action at a distance”, in which subatomic particles that are nearby each other influence each other in some way, such as the direction they spin in.
However, the strange effects of entanglement mean that when these two particles are separated, no matter at how vast a distance, if one is changed, the other goes through the same changes at exactly the same time, meaning these two particles are intimately and forever connected.
The principle of entanglement can be used by quantum devices for the exponentially faster communication of information.
“Our work shows that quantum communication technology is sufficiently mature for large-scale practical applications,” said Jianwei Pan, Professor of USTC. Similarly, a global quantum communication network can be established if national quantum networks from different countries are combined, and if universities, institutions and companies come together to standardize related protocols, hardware, etc., he added.